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Hello all, about three weeks ago I stopped and put gas in my 02 WRX. After fueling I went to start the car and although the engine would turn over, it would not start. It acted like it was not getting fuel, although I know I had enough gas in the tank. I removed the main line into the fuel filter and turned the key on, i could hear the pump prime and come on, but no fuel made it to the front of the vehicle. I ended up flat towing the vehicle back to my garage and began normal diagnosis, I disconnected everything minus the harness from the pump and powered it on, fuel came out of the line, I then blew out all the lines with the compressor and hooked everything back up, tried the ignition and she fired. fast forward a week and the same symptoms showed up, I ended up replacing the pump with a tested "pre-loved" OE pump, got installed and everything seemed fine for another week. After a week of everything running fine I walked out of work at lunch and turned the key to find the same symptoms as before. After once again disconnecting everything from the pump besides the harness, I turned the key to the on position and heard the pump prime and kick on, but no fuel came out of the main. I contacted the parts store and they replaced the pump with another, however, this one lasted barely an hour, same symptoms. I once again contacted the used parts supplier and they provided me a 3rd pump. This was 4 days ago. Yesterday, after filling the gas tank, I pulled into my driveway and turned the car off for about 20 minutes to shovel, when I jumped back in the car to move it forward it wouldn't start, same symptoms, sounds like the vehicle is not getting gas. In between all the pumps I have verified voltage at the connector, and there have been no idle or acceleration issues when the car was actually working. Back to yesterday, for ****s and giggles I unplugged the connector from the pump and then disconnected the ground terminal from the battery, I then reconnected the connector to the pump and reconnected the battery (in that order), after a coupe of turns the engine fired and I had to step on the accelerator to get the idle up. This morning she fired up again, but at lunch on work it wouldn't start and I repeated the above process to get it going. When I came out later in the day the same thing occurred, however, it took a good 3 or 4 cycles of unplugging the connector and battery to finally get it started. I am going to check the fuel pressure once it warms up a little more (I live in central NY) and if everything looks good there I will move onto the harness. I have a feeling it's either wiring or ECU, but as I said I have verified voltage. Chances are it could be intermittent, as relays are known for that, but I am looking for any suggestions or ideas. I am waiting on taxes, and permission from the wife, to do timing, TGV delete, and tune (potentially an AP), but I need to nail this down. Any and all ideas would be greatly appreciated.the car has 180k, has had a handful of dumb issues. The guy who owned it before me (2nd owner since 14k) had an AP and unmarried it before I purchased it. I have always been suspect of his return to stock tune, I know this is a priority but I really don't know where else to go with this issue.

Hmmm I have very very similar issue going on I actually just made a thread about it too. Please keep this updated if you find anything. Weird thing on mine is its getting fuel passed the filter and reeks like it's flooding but will start on ether but won't stay running.

Bug, have you check your injectors? You can use a flashlight to see if they are at all wet while the vehicle is running, I picked sone OE re-manned injectots from advanced for $65 a piece. Also, have you investigated the fuel line recall? I'm not entirely sure if the wagon qualifies, but there is a recall on the line that runs under your manifold, might be worth looking into as I just bought the car last December and I had all recalls taken care of, dealer even had to provide a loaner. Give them a call and check, there is a control arm recall too

Ok so I blew the lines out and found no sort of obstructions, also opened the tank and checked for any bad elements. All looked good. This is what I've replaced so far. Pump, fuel pump relay, filter, and I have Perrin fuel rails and brand new 750cc injectors. I'm thinking it could be the fuel pressure regulator.

The frustrating thing is its so hard to duplicate the occurrence, so until it strands me i have no idea if its fixed or not. The weird thing for mine is it started on ether but wouldn't keep running. But after it sat overnight would start like a champ.

So there for I think that either the fuel injectors aren't cycling, or the fpr is randomly malfunctioning. Sorry to thread jack but our issues seem pretty similar.

Also my buddy, a non-Subaru guy. Is telling me I should replace my coolant temp sensor, that it might be reading way to hot and causing the ecu to go into a safe mode. Which seems logical, but if the sensor was buggered it would make the dummy gauge read hot too I'd think, but that was normal when the symptoms showed up.

But that theory provides true since it A. Didn't start on a really hot day 107 when it was sitting in the sun and B. Died and wouldn't start after beating on the car playing in the snow. Each time the car would have to sit overnight and would start perfect in the morning.

Ok one last thing then ill wait for a response lol. Seeing that it could be a fuel issue maybe the other side of it not getting it but rather maybe it getting to much and flooding? Could that still start on ether?

My tune seems really fat and maybe the "warm" start up enrichment tables are really rich. Just a thought, cuz my tuner (Clark Turner) had a hell of a time tuning my car. E-tune with a access port. In the beginning of tuning it he had to max my injectors because I was running lean but it turned out to be not compensating for my intake on the map sensor. Maybe the figures are still off slightly causing this random occurrence. Just a idea. Is your car completely stock? Original owner? No ecu mods?

In your case bug I would probably go ahead an just replace the FPR. As for my car, I bought it off of the 2nd owner, who purchased it with 14k on it. He had handful of mods on the car, including a larger turbo and an AP, I believe when he unmarried the AP is corrupted the stock map or it was incomplete, as I have some weird issues in the past (when I first bought the car, after about a month I had all 4 cylinders misfiring, got those nailed down with the recall, plugs and coils replaced, fuel filter, stock remanned injectors, crank sensor, and cleaning the MAF and throttle). For current mods the car only has a soft turbo inlet (which came with the vehicle) and a Tomioka UE length pre turbo exhaust. The fuel issues did not start until 6 months after the exhaust was installed. Also, I have P1088 tumble generator valve #1 RH position sensor circuit low input, which I have searched and read and so on, but from the OP I will be doing the delete in the near future and am not concerned with it. Also, I would say the ECU might be limped but the code has been on for awhile and this issue came from out of the blue. Either way- I bought it with 170k knowing that it was going to need to work, actually the reason I bought it. I have had the vehicle since Christmas of 2011, the fuel issue is new. The problem is currently at I can get it running by power cycling the ECU, it may take a couple of times but once it runs it stays running until I turn it off. Sometimes it will start back up, sometimes it won't, then I'm stuck power cycling the battery again. I haven't driven it in over a week, and the backseat is currently out of the vehicle. I talked with multiple Subaru shops who were no help to me, however, they did tell me they can flash the most updated stock map for $95.00, so I think I am going to start there before I drop the tank and start searching through the harness for a possible wiring issue. I figure if I get the ECU flashed and the car still fails, I know where I need to go next. Your issue sounds like it may be A/F related, but you also may be on to something with the FPR. I haven't priced an FPR yet but I would start there and then maybe look at your tune?

Ok so I played with it some more today. Replaced the coolant temp sensor, unlikely the culprit but it looked a little warn had a bunch of yellow gunk on it.
I'm really hoping this fixes my occasional problem but until it strands me again I have no clue I still might replace my fpr just for insurance. Ill keep you informed also let me know if you pin point anything as well.

I'll definitely keep you updated, I'm going to try and get her to the dealer this week for the reflash...it sucks because I will be paying for a tune in about 45 days, but I really think the ecu is the culprit. Let me know if that took care the issue for you, although seeing how that sensor looked, if you have never replaced the fpr I would do it, look at that sensor you just pulled :/
Also, how much was the sensor out of curiosity?

The sensor was $25 from Subaru even came with a crush washer, which I noticed after I put it in having to pull it out and make a big coolant mess twice. My afrs seem ok. I'm gonna have my tuned touched up. Also first oil change on jdm motor and my oil plug was all gunked up too so maybe Ill need to work out a couple kinks on this car

I replaced the FP relay and still no start. Checked connector at fuel pump controller. I have 11.75 going in (white and black wire), I have a 10.75 coming out of the controller to pump (black and orange) I'm pretty sure the ground stayed at 0 ohms for resistance, but I'm running back and firth checking it myself. Any ideas everyone?

So i checked all wiring today, all voltages look good. Got another FP connector from the junkyard and wired it straight to battery with ground and 12v. Pump would turn on but no fuel. Tried another pump I went and grabbed from the junkyard and swapped them out, ran connector to it and pump wouldn't even turn on. reconnected everything and checked voltages and resistance everywhere. All measurements look good. Went a pulled a previously failed pump from my garage and opened it up, looked like the rubber check valve was stuck. I have no idea at this point what is causing my problem. I would say bad gas but the pump itself would still be pissing fuel out the top when we ran straight power and ground to it but we've got nothing, even though it sounds like it's running. I'm thinking the check valve is sticking closed, but I have no idea why this would be happening and why it would happen on 4 pumps. Anyone have any ideas what would be causing these pumps to go bad? Also, I checked fuel pressure and there is nothing, this is kind of relevant but not really since I eliminated the car from the scenario and ran the pump stand alone and got no fuel out the pump. Obviously the pump is bad but this is the 4th one, the car has never lasted more than 36 hours before failing- something is making these pumps fail. Please help.

I ordered a Walboro 255 and got that installed, also got 4 barely used stock injectors for my rear lip I was never going to use. Got everything installed and the car starts and runs good. I'm aprehensive because the car would always start after putting in a pump, it' s just that this one is new. Check FP and it seems a little higher than what I've found. Some say 38psi at idle, some say 42psi, I am running about 43psi at idle. Anyone see any issue with this measurement?